Possibly the world's only drive-in movie theater with an attached motel.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

A mental health hospital dating back more than 139 years, now features a museum.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

While comics are the main attraction at this megastore, the second floor plays host to an exhibit fit for a museum.

This iconic science fiction house still looks like something from the future.

A recreation of an Old West apothecary full of curios.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

The clock that sets them all.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

This museum offers an actual time machine back through Colorado's past.

A collection of over 15,000 zines works to preserve DIY publishing culture.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

See six states, pickled freaks, rocks, and antiques.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.